Questioning the use of the Bejar method to determine unidimensionality

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References

Bejar, I. 1980: A procedure for investigating the unidimensionality of achievement tests based on item parameter estimates. Journal of Educational Measurement 17, 283-96.

Henning, G. , Hudson, T. and Turner, J. 1985: Item response theory and the assumption of unidimensionality . Language Testing 2, 141-54.

Chen, Z. and Henning, G. 1985: Linguistic and cultural bias in language proficiency tests . Language Testing 2, 155-63.